What the order code actually is
The part is a 1FK7 compact synchronous servo motor from Siemens, listed under order code 1FK7042-5AF71-1FH3, sitting in the Servo Motors category above Motors and Motors & Motor Controls in the catalog hierarchy (cites:,). Compact synchronous servos of the 1FK7 generation are the workhorse frame on Siemens SINAMICS lines — a low-inertia rotor matched to a multi-turn absolute encoder, intended to mount on a machine slide or gearbox input where the cycle budget is tight (cites:).
Lifecycle read: this code is in the EOL-hot window
For a cell builder this is the moment to lock in spares for every cell already in the field while there is still genuine stock on the shelf, and to design any new cell around a confirmed-in-production replacement rather than this exact suffix.